Automatic gas cock control



INVE'NTOR. Henry flarjiloff h m wwgf, 3 m" v k ATTORNEYS Sept. 27, 1932, H. MARGILOFF AUTOMATIC GAS COCK CONTROL Filed Oct. 13 1930 Patented Sept. 27, 1932 UNITED. STATES PATIENT, OFFICE HENRY manernorr} on BROOKLYN, New Yonx, ASSIGNOR TO-ELSIIE MABGILOFF, OF'

, 1 J mooxLYN, NEW YORK ammmc Gas coox CONTROL Application' flled October 13, 1930. serial n. 488,437.

The present invention relates to safety dey vices for gas burners and the primary object of the invention is to provide automatic control means for closing gas cocks of gas burners should the burner become ext1ngu1shed.

A further object of the invention'is to provide a thermostatically controlled shut-ofi device for gas cocks or valves which may be readily applied to existing types of gas burners.

A further object of the invention is to provide an automatic gas cock control-which Wlll permit regulating the amount of gas supplied to the burner andis operable from any adjusted position for shutting off the flow of gas in the event heat ceases to exist at the burner.

A still further and important object of the invention is to provide a device of this character which is of extremely simple construction. a a i 1 Other objects and advantages of theinven tion will be apparent during the course of the following detailed description, taken in connection with the accompanying drawing forming a part ofthis specification and in which drawing:

Figure 1 is a top plan view showing the device applied to a gas burner and with the gas cook or valve in its closed'position.

Figure 2 is a section on the line 2-2 of Figure 1. i

Figure 3 is an enlarged vertical section thru the gas cock.

Figures 4 and 5 are sections on the respective lines in Figure 3. a

In the drawing, and wherein similar reference characters designate corresponding parts throughout the several views, the numeral 6 clesignatesa gas burner provided with the burner feed'pipe 7 which is connected by the gascock or valve 8 to the supply pipe 9. The gas burner 6 is provided-fat its under side with the usual legs 10 adaptedto rest upon the supporting rod ll as in the usual manner of supporting gas burners. The stationary supporting rod 11 extends diametrically beneath the burnerf6 and in the present invention serves as a mounting the thermostatic connipples 14 and 15 for respective connection with the pipes 7 and 9 and forming communication therebetween when the valve is in an open position. The valve body 13 is provided with a tapering valve seat 16 in which is rotatably mounted a tapered plug valve or cone 18 provided at its upper end with an operating handle 19. At the lower end of the valve 18 is areduced stem portion 20 which projects below the lower end of the valve body and has threaded thereon a nut 21 against which is mounted a washer 22.

Provided in the lower end of the valve body 13 is a cavity 23 having a greater diameter than the lower end of the tapering valve seat 16. Arranged in the cavity 23 is an expansion coil spring 2st the lower end of which acts upon thewasheri 22 for normally urging the valve downwardly into seating engagement'with the seat 16. Arranged also within the pocket or cavity 23 is a preferably flat. spiral spring 25 which is extended spirally about the stem 20 inwardly of the expansion coil spring 24. This spiral spring 25 acts as a return spring forthe valve 18' and has its inncrend attached as at 26 to the stem 20 and has its outer end attached as at 27 to the valve body 13. A suitable stop pin QSimay be provided at the upper end of the valve plug 18 for limiting rotation of the plug thru The spiral spring 25 acts to a normally rotate the valve plug to a position whereby the valve will be shutoli.

i The thermostatic control means 12 is adapted, when the burner is lit, to retain the gascock or valve 8 in its opened position, and when the flame is extinguished to release the pet cock and permit automatic closing thereof by the spring 25 and thus shutting off the flow of gas to the burner.

Adapted for adjustable mounting upon the burner supporting rod 11 is a thermostat 30 which is preferably formed from two metal strips having different coefficients of expan 'fio sion. The lower ends of these thermostatic metal strips are secured together in an upfrom the burner 6. The thermostat may be slightly arcuated as shown in Figure 2 and has its upper ortion arranged so as to extend into the aim of the burner when igf' nited.

Rigidly secured as by riveting or the like at one end to the upper end of the burner thermostat 30 is a conduction rod 34 whiclrextends forwardly along the burner pipe 7 and has its forward end rigidly secured as by riveting or the like to the central portion of a thermostat 35 arranged at one side of the as cook or valve 8. :This rod 34 is preferafily formed from a suitable metal having good thermal conductiv ity.

The valve thermostat 35 is also preferably formed from two metal strips havln different co-eflicients of expansion and t e said strips are secured together at their lower ends in an extension 36 projecting from one side of the valve body 13. Afiixed to, and serving to connect the upper ends of the strips of the thermostat 35 is a preferably cylindrical locking pin 38 having free sliding movement thru a guide opening 40 provide in the Valve body 13 above the nipples 14 and 15 and opening into the tapering valve seat 16. The inner-end of the locking pin 38 is rounded as shown in Figure 3 and is adapted for movement into any one of the series of semi-circular shaped notches 42 arranged circumferentially in the valve plug 18. These notches 42 serve as means to permit regulation. of the flow of gas to the burner 6 when the burner is lit and the lockinggpin 38 is enga ed in one of the notches. y observing igure 3 it will be noted that when the control means 12 is in a cold condition that the locking pin 38 is out of engagement with the notches 42 sothat the plug valve 18 is permitted to be returned to an off or closed position by the spring 25. r

In operation, and with the parts in position as shown in the drawing, the handle 19 may be grasped for opening the valve to the desired extentagainst the action of the spring and permitting the flow of gas from the supply pipe 9 to the burner 6. The gas escaping the flame strikes the burner thermostat heating the same and causing the thermostat rounded end of the locking pin 38 into one.

from the burner 6 is then ignited and prevents counter-rotation of the valve plug 18 by'the spring 25 and maintains an open flow of as in the burner 6. .Thus it will be seen t at the locking pin 38 is moved by a twistin movement of the rod 34 and also thru heating of the thermostat 35 by the heat conducting rod 34. Attachment of one endof the rod 34- to the upper end of the thermostat 30 disposes the rod end in the flame of the burner, and by attaching the opposite end of the rod to the central portion of the ther-' mostat 35 insures quick heating of the thermostat 35 by permitting the heat to travel in both directions from .the central point of con-,

motion of the rod to the thermostat. It may be found necessary to maintain ones grip upon the handle 19 for a short period of time to permit actuating of the locking pin 38 into a locking position with the valve.

Should the flame at the burner become extinguished for any reason and heat'cease to exist at. the burner the thermostats 30 and 35 will immediately move away from the burner and valve respectively so that the locking pin 38 is withdrawn from its engagement with the valve plug 18 and permits the spring 25 to rotate the valveto an off osition and closing the flow of gas to the urner 6.

Thus it will be seen that an improved thermostatically controlled safety device for gas burners has been provided whereb the gas cook or valve will be automatically 0 osed should the burner become extinguished for any reason and heat cease to exist at thev burner. It will also be apparent that an extremely simple device of this character has been disclosed which may be readily applied to existing types of gas burners and one which will be quick in its action of operating the locking pin to either a holding or released relation to the valve.

Changes in detail may be made to the form of invention herein shown and described,

without departing from the spirit of the invention or the scope of the following claims. 1

I claim: 1. In combination, a burner, a control valve for the burner including a plug valve provided with circumferentially arranged notches, means. normally rotating the plug valve to a closed position, a thermostat adjacent the burner to extend into the flame thereof, a second thermostat mounted upon the control valve out of the path of the flame, a locking pin carried by the last mentioned thermostat and normally held out of engagement with said notches, and a heat conduction rod rigidly connected between the thermostats for actuating the locking pin in accordance with thermal conditions at said burner.

2. In combination, a gas burner, a conotl positio trol valve for the burner including a plug valve provided with circumferential notches, nieans normally rotating the plug valve to an ofi position, a burner thermostat mounted to extend into the flame of the burner, a valve thermostat mounted at one side ofthe control valve, a locking pin carried by the valve thermostat for engaging in said notches, and

a heat conduction rod having one end rigidly connected to the burner thermostat and its opposite'end rigidly connected to the valve thermostat for movement of the locking in.

3. In combination, a gas 'burner a control valve for the burner including a plug valve provided with circumferential notches, means normally rotating the plug valve to an ofl position, a burner thermostat mounted to extend into the flame of the burner, a valve vent duct mounted at one side of the control valve, a locking pin carried by the valve thermostat for engaging in said notches, and a hayonet-shaped heat conduction rod rigidly connected at one end to the upper end of the burner thermostat and at its 0 set end rigidly connected to the central portion of the valve thermostat, said locking pin normally being out of engagement with the notches and having movement thereinto when a heat exists at the burner.

4. In thermostatic control means for a ve burners, the combination of a control v including a valve body provided with a conical valve seat, a plug valve rotatable in the valve seat and provided adjacent its upper v end with aseries of circumferentially s aced notches, astem projecting from the pw. en

end of the plug valve, a spiral spring connected between the stem and valve body for normally rot ting the plug valve into an r gid valve body havin an opening therethru at said notches, a t ermostat mounted at its lower end upon the valve body, a locking pin carried by the upper end of the thermostat and movable thru the opening in the valve body into said notches, conduction rod rigidly connected at one end h; the central portion of the thermostat, a 1M1 thermostat mounted to extend into the e of the burner, and means rigidly connecting the opposite end of the conduction rod to the upper end of said second mentioned iiLJI'Z'D HENRY MARGILO 

